Dusting tool for suction cleaners



Dec. 21, 1937. l H, B; WHWE 2,103,050

DUSTING TooL FOR sUcTIoN CLEANERS Filed Feb. v26, 1936 ZHSheetS-Shel'. l

` i y ATTORNEY Dec. 21, 1037-. H, B, WHITE Y 2,103,050

I l DUSTING T0011 FOR SUGTIN CLEANERS Filed Feb. 26, 1950 .2 sneeuw-Sheena INVENTOR ATTORNEY manteaux'. 21, 1937 2,103,050 nUs'rnvG 'rooL ron sUc'rIoN onnmns lHarry B. White, Canton, Ohio, assignor to The Hoover Company, North Canton, Ohio, a. cor- 4 poration of Ohio Y Application February 26, 1936, Serial No. 65,768

s claims. (onzas-115) This invention relates to improvements in dusting tool equipment for suction cleaners and more particularly to an improved connection or joint to be used wherever two parts or sections of a dusting tool set are joined together for detachable connection.

It is well known in the art, most portable types of suction cleaners are equipped with a hose or ilexible tubular extension, together with an assortment of cleaning tools suitable for draperies, upholstered furniture and surfaces other than floor coverings which may require suction cleaning. Provision is made for connecting one end of the extension hose to the cleaner,"while the various tools and accessories are interchangeably attachable at the other end. Manifestly, the simw plest joint and one that has been extensively used heretofore, is thisplain friction type consisting of two interiitting tubular sections or sleeves. But in the suction cleaning art, at least, this style has been replaced by more positive'types such as the familiar bayonet joint or the spring latch type of joint characterized by a nnger pressed release button. j

It is the purpose of the present invention to provide an improved type of joint, calculated to be superior to those heretofore employed and particularly desirable for connecting the various parts constituting a set of dusting tools for a suction cleaner.

v In devising a practical `joint or connection for a set of dustingtools, it is important that the two connecting portions be not only locked together 1 so that they cannot be pulled apart accidentally, but also, lthat the Joint be air-tight and thus sealed against leakage and consequent loss of suctool.

tion. Thus, one characteristic of the type of joint herein disclosed is the provision of a metal-tometal air-tight seal between the two ntertting end portions in addition to a positive locking or connecting member best described 'as a modification or variation of the familiar bayonet joint but which, by virtue of its novel construction and` method of assembly, has a certain degreefof resiliency whereby the interfitting parts once connected are held tightly together under tension.

With the foregoing introduction, the present invention will now be described in connection with l Ithe accompanying drawings in which:

suction cleaner with hose land dusting tool attached.

Figure 2 is an enlarged detailed view in partial section of a joint between the hose and a dusting Figure 3 is a view similar to Figure 2, but with the parts disconnected.

Figure 4 is a view in cross-section taken on line "4 4 on Figure 2.

Figure 5 is a perspective view of a pair of the connecting spring members in their relative positions when assembled.

Figure 6 is a detailed view in vertical section showing the method of connecting the hose to the cleaner and Figure 'l is a view similar to Figure 8 showing the ends of the hose disconnected from the intermediate fitting. o

As clearly illustrated in Figure l, a typical application of dusting tools to a suction cleaner includes a hose or flexible conduit i, carrying 'a dusting tool 2 at its outer end and having detachable connection at its inner end with the cleaner metal section or extension 5, having a somewhat p tapered nd portion 5a which has interfltting connection with the complementary socket-like portion 2a of the dusting tool 2 when the parts are joined together. More accurately, the end of the4 hose extension 5 acquires its tapered contour by two sections of reduced diameter and marked by more or less abrupt shoulders, as clearly shown in Figure 3. Near the base of the tapered end portion 5a of the hose extension 5 is a pair of diametrically opposed lugs 6, B in the form of short pins projecting, say, 115th of an inch from the surface. And lastly, the edge at the outer end of the hose extension 5 is bent inwardly at an angle o`f approximatelyv 30 degrees, thus providing a bevelled sealing lip 1.

The socket portion 2a oi the dusting tool 2 is manifestly the counterpart of the tapered end portion of the hose extension 5, the two inter-4 iitting with a fairly snug but not a tight fit. In fact, as clearly shown in Figure 2, actual contact between the two interfltting portions occurs only at the inner end of the hose receiving socket, where the bevelled end i of the latter has sealing contact with a complementary bevelled shoulder 8 marking the bottom of the socket and at a point 9 midway between the shoulder 8 and the outer end of the socket, just rearwardly of the -intermediate shoulder of the tapered end 5a of the hose. Inwardly fromV this point of annular contact at 9 the hose receiving socket consocket is increased abruptly in diameter to form an enlarged outer end section marked by an abrupt shoulder I and an annular space oi' appreciable width between the interfltting end of the hose extension and the socket when the former is inserted as clearly shown in Figure 2. This annular space outwardly from the shoulder I0 accommodates a pair of resilient connecting members II, II coacting with the lugs 6, 6 to hold the parts in locking connection with each other. These connecting members II, II, as

clearly shownfin Figure 5 are symmetrically ar-4 ranged internally o'f the enlarged outer end por.- tion of the socket la` and together form the halves of a resilient locking ring coacting with the pin-like projections 6-6 after the'manner of the familiar bayonet joint.

Now each of the connecting members II has an enlarged centrally disposed body portion IIa with a hole I Ib punched therein whereby each is rigidly fastened as by a rivet I2 to the inner wall of the socket portion 2a. as clearly shown in Figure 4. Extending from one side of the body portion I Ia of each spring member II and in a clockwise direction as viewed in Figure 5, is a long curve linear arm I3 extending circumferentially through an arc of approximately 9U degrees and terminating in a right angled detent I3a. And extending from the opposite side of the body portion II a of eachspring member II is a somewhat shorter arm I4. And finally, each connecting spring has a transverse finger I3b located midway between the ends of the longer arm I3, the end of this linger as well as the end of the shorter circumferentially extending arm I4 bearing against the shoulder I0 as clearly shown in Figure 3. As assembled, the detent .I3a at the end of the arm I3 oi' each connecting spring member II projects outwardly toward the open end of the socket as clearly shown in Figure 3 and, being firmly held against turning on the rivet by the abutting contact of the arm I4 'and finger I3b against the shoulder I0, the only locking member, stopmembers or lugs I5, I5 are` provided on the internal surface of the socket immediately behind the detents I3a, I3a of the varm I3, I3, so as to limit the amount said arms may flex in an outwardly direction.v

Now by referring to Figures 2 and 3, it will be seen that upon presenting the end of the hose extension 5 to the socket oi' the dusting tool as in Figure 3, and forcing the former vinto the latter, that the lugs 6, 6 will rst encounter the springs II, II- and then, by rotating the two intertting parts relative to each other, the lugs 6, 6 will presently enter the somewhat oblique passages between the arms I3a of one and the shorter arms I 4 of the other connecting member II. Entering these passages then, the lugs 6, 6 upon further rotation of the two interfitting parts exert a cam action rst on the outer and then on the back edges of the detents i3d, i3d, thus forcing the said arms to yield in an outward direction as said lugs slide along their back edges toward notches I6, IB at the base of each spacing finger I3b, as is shown in Figure 2. Now, once lodged in the notches I6, I6, the lugs 6, 6 are resiliently and yieldingly held against release, with theresult that the two partsl are firmly locked or joined together as long as the dusting tool is being utilized for cleaning. However, a relative twisting or rotating movement of the parts in the opposite direction releases the lugs B, 6 from the notches I 6, I6 and the dusting tool may be readily removed.

In this connection, however, it is to be observed that the resilient connecting members act on the pin S, 6 in a direction to force the end of the hose extension firmly into the socket thus bringing the sealing lip 'l into tight sealing contact with lthe bevelled shoulder 8. Now, this thus possible to maintain an air-tight metal-tometal seal between the parts and thus dispense with the more expensive construction requiring the insertion of rubber gaskets at the joints.

While the joint construction described is duplicated throughout the dusting tool equipment, it may be helpful to observe how this duplication is carried out at the inner or cleaner end of the hose. dusting tools it is first necessary to divert the suction from the cleaner nozzle to the dusting tool, this ordinarily being done by attaching the so-called converter member or iitting 4 over or around the fan eye or opening I'I leading from the passage from the nozzle chamber into the fan chamber as clearly shown'in Figure 6. This auxiliary fitting or converter member has the general form of an elbow iltting designed to have one end inserted into the fan eye and locked with its outer end extending laterally from beneath the cleaner casing, as clearly shown in Figure 1. The outer end of the converter fitting 4 is provided with a socket 4a and connecting spring assembly I8, similar in all respects to the socket portion 2a of the dusting tools. However, there is a slight difference in the length of the fitting I9 at the inner end oi' the hose I but otherwise the design and locking action of the interntting parts are thesame.

Thus having described the novel Joint construction particularly adapted for applying dusting tools to a suction cleaner, it is apparent that the same may properly be termed a resilient bayonet type, the advantages of which are at least two-fold. First, the interiitting and connecting oi the hose end with any one oi' several 'interchangeable tools or accessories by insertin` axial direction thereby establishing an airtight seal between contacting bevelled surfaces calculated to prevent air leakage at the joint without the necessity of introducing additional sealing means such as the rubber rings or gaskets.

Having thus disclosed a preferred embodiment of the invention, I claim: I

1. The combination with a pair oi.' tubular` members adapted to have their end portions con- In operating the cleaner with the' nected by ntting one within'the other, of a resilient bayonet type joint therefor comprising projecting lugs disposed diametrically opposite each other on the internal of said tubular members and coacting connecting members mounted within the external of said tubular members` and having resilient arms provided with marginal notches 'adapted to contact said lugs and yieldingly lock said tubular members together vin the predetermined relative rotation thereof.

2. The combination with a pair of tubular.

members adapted to have their end portions joined by interiitting one within the other. of a resilient type of bayonet joint therefor, comprising a vcurvilinear spring mounted circumferen-- tially within an internal recess in the external' of said tubular members andi having a resilient `arm adapted to engage' a lug on the internal cent the outer end'of the external of said tubular oi said tubular members.

3. The combination with a pair of tubular members adapted to have their end. portions Joined by interfltting'one within the other, of a resilient type of bayonet joint therefor, comprising a pair of substantially semi-circular springs mounted within an internal recess adiamembers and' having resilient arms adapted to have latching engagement withcomplementary lugs on the internal of said tubular members in the act of rotating the sameV relative-to each other.

4. The combination vwith a pair of tubular members adapted to have their ends iitted one arms and acting to yieldingly hold said lugs in V latched position.

-5; The ,wmblnatlon with a panof tubular members' adapted to be joinedtogether vby inter- 4s iitting the end-portion of one into a socket-like end portion of the other. said internal member y aroaoso fhaving a beveled end adapted to contact a beveled Jseatat the inner end of the socket portion of saldi external member, the latter having a pair of resilient connecting members arranged circumferentially about the end thereof and including a 6 vpair o! diametrically opposed marginal notches and a pair of correspondingly disposed lugs on Ysaid internal tubular member adapted to 'be brought into latching engagement with said notches to hold said beveled end in sealing con- 10 tact with its seat.

t 6. I'he combination with a1 pair of tubular members adapted to be connected with their ends fitted one withinthe'other by a bayonet type joint comprising a lug projecting radially from one and 15 a latch member carried by the other of said tubular members, said latch member consisting or a circumferentially arranged iiexible arm having a marginal notch adapted for latching engagement with said lug. l 20 7. The combination with a pain of ftubular members adapted to have their ends fitted one within the otherand held by a bayonet type joint comprising radially vprojecting lugs on one and latch members on lthe other of said tubular mern- 25 bers. said latch members including exible arms arranged circumferentially about the entrance to said last mentioned tubular member and having marginal notches adapted to engage said lugs yieldingly. l 30 8.' 'I'he combination with a -palr of tubular A members-adapted .to have their ends iltted-one within the other and to be detachably connected by a bayonet type joint comprising radially pro,-

jecting'lugson the internal oi' said tubular mem- 35 bers and coacting latch members consisting o! flexible arms mounted adjacent the entrance-.to the lexternal of said tubular members and arrangedcircumferentially thereof with portions spaced apart to form helical grooves to guide saidv '40 lugs, said-latch members having marginal notches adapted yieldingly to engage and disengage said lugs in the-relative rotation of said tubular members into and out of interiltting relation'.v y 45 HARRY B. 

